Engineered for commercial applications, the Siemens MBKQJ3175A is a complete 175A main breaker kit providing long-time and instantaneous overcurrent protection. This bolt-on assembly installs into Siemens Revised P1 panelboards (interiors ending in T or N). It serves as a direct replacement for the legacy MBKQJ3175, ensuring seamless integration with modern 3-phase systems. The included QJ2 frame breaker delivers a 10kAIC rating at 240VAC and accepts 6 AWG to 300 kcmil wire.
Specifications
Key specifications
For Use With
Siemens P1 Panelboards (Revised/Next Gen)
Mounting Type
Bolt-On
Standards
UL 489, CSA C22.2
Voltage
240VAC
Electrical ratings
Amperage
175A
Poles
3
Phase
3
Interrupting Rating
10 kAIC @ 240V AC
Fit and installation
Frame Type
QJ2
Terminal Connection
Lugs
Length (in)
7.812
Width (in)
4.625
Height (in)
4.625
Wire Gauge
6 AWG - 300 kcmil (Cu), 4 AWG - 300 kcmil (Al)
Standards and features
Approval
CSA, UL
Accessories
Mounting Hardware, Load Side Lugs Included
Temperature Rating
40C
Body Material
Composite
Product details
Series
MBK
Brand
Siemens
MPN
MBKQJ3175A
UPC
887621791353
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